This paper poses a problem for traditional phylogenetics: The identity of organisms that reproduce through fission can be understood in several different ways. This prompts questions about how to differentiate parent organisms from their offspring, making vertical gene transfer unclear. Differentiating between parents and offspring stems from what I call the identity problem. How the problem is resolved has implications for phylogenetic groupings. If the identity of a particular asexual organism persists through fission, the vertical lineage on (...) a phylogenetic tree will split differently than if the identity of an organism does not survive the fission process. (shrink)

Zusammenfassung Diese Einleitung führt in den theoretischen Rahmen des Sonderbandes zu Prozessen von Abgrenzung, Grenzziehung und Grenzverschiebung in islambezogenen Feldern ein. Zugleich wird reflektiert, dass auch religionswissenschaftliche Forschung Grenzen definiert und dabei mit dem Forschungsfeld interagiert. Religiöse und wissenschaftliche Diskurse werden als Bereiche eines interdependenten und miteinander verwobenen Kontinuums konzeptualisiert, innerhalb dessen die Grenzen nie ganz fixiert oder undurchlässig sind. Indem Konstruktionsprozesse von Islam oder muslimischen Identitäten an den Schnittstellen unterschiedlicher Felder geschehen, rücken Grenzen nicht nur als Werkzeug für politische (...) Strategien in den Blick, sondern auch als Kontaktzonen, Schwellen und Orte von Transfers und Wissensproduktion. Die Einleitung betont daher den religionswissenschaftlichen Beitrag zur Konstruktion von Islam und diskutiert die Verortung der Disziplin in diesem Spannungsfeld. (shrink)

Horizontal transfer (HT) is the transmission of genetic material between non‐mating species, a phenomenon thought to occur rarely in multicellular eukaryotes. However, many transposable elements (TEs) are not only capable of HT, but have frequently jumped between widely divergent species. Here we review and integrate reported cases of HT in retrotransposons of the BovB family, and DNA transposons, over a broad range of animals spanning all continents. Our conclusions challenge the paradigm that HT in vertebrates is restricted to infective (...) long terminal repeat (LTR) retrotransposons or retroviruses. This raises the possibility that other non‐LTR retrotransposons, such as L1 or CR1 elements, believed to be only vertically transmitted, can horizontally transfer between species. Growing evidence indicates that the process of HT is much more general across different TEs and species than previously believed, and that it likely shapes eukaryotic genomes and catalyses genome evolution. (shrink)

Fundamental questions in evolution concern deep divisions in the living world and vertical versus horizontal information transfer. Two contrasting views are: (i) three superkingdoms Archaea, Eubacteria, and Eukarya based on vertical inheritance of genes encoding ribosomes; versus (ii) a prokaryotic/eukaryotic dichotomy with unconstrained horizontal gene transfer (HGT) among prokaryotes. Vertical inheritance implies continuity of cytoplasmic and structural information whereas HGT transfers only DNA. By hypothesis, HGT of the translation machinery is constrained by interaction between new (...) ribosomal gene products and vertically inherited cytoplasmic structure made largely of preexisting ribosomes. Ribosomes differentially enhance the assembly of new ribosomes made from closely related genes and inhibit the assembly of products from more distal genes. This hypothesis suggests experiments for synthetic biology: the ability of synthetic genomes to “boot,” i.e., establish hereditary continuity, will be constrained by the phylogenetic closeness of the cell “body” into which genomes are placed. (shrink)

Written for non-experts, this volume introduces the mechanisms that underlie reticulate evolution. Chapters are either accompanied with glossaries that explain new terminology or timelines that position pioneering scholars and their major discoveries in their historical contexts. The contributing authors outline the history and original context of discovery of symbiosis, symbiogenesis, lateral gene transfer, hybridization or divergence with gene flow, and infectious heredity. By applying key insights from the areas of molecular (phylo)genetics, microbiology, virology, ecology, systematics, immunology, epidemiology and computational (...) science, they demonstrate how reticulate evolution impacts successful survival, fitness and speciation. Reticulate evolution brings forth a challenge to the standard Neo-Darwinian framework, which defines life as the outcome of bifurcation and ramification patterns brought forth by the vertical mechanism of natural selection. Reticulate evolution puts forward a pattern in the tree of life that is characterized by horizontal mergings and lineage crossings induced by symbiosis, symbiogenesis, lateral gene transfer, hybridization or divergence with gene flow, and infective heredity, making the “tree of life” look more like a “web of life.” On an epistemological level, the various means by which hereditary material can be transferred horizontally challenges our classic notions of units and levels of evolution, fitness, modes of transmission, linearity, communities, and biological individuality. The case studies presented examine topics including the origin of the eukaryotic cell and its organelles through symbiogenesis; the origin of algae through primary and secondary symbiosis and dinoflagellates through tertiary symbiosis; the superorganism and holobiont as units of evolution; how endosymbiosis induces speciation in multicellular life forms; transferrable and non-transferrable plasmids and how they symbiotically interact with their host; the means by which pro- and eukaryotic organisms transfer genes laterally (bacterial transformation, transduction and conjugation as well as transposons and other mobile genetic elements); hybridization and divergence with gene flow in sexually-reproducing individuals; current (human) microbiome and viriome studies that impact our knowledge concerning the evolution of organismal health and acquired immunity; and how symbiosis and symbiogenesis can be modelled in computational evolution. (shrink)

A phylogeny that allows for lateral gene transfer (LGT) can be thought of as a strictly branching tree (all of whose branches are vertical) to which lateral branches have been added. Given that the goal of phylogenetics is to depict evolutionary history, we should look for the best supported phylogenetic network and not restrict ourselves to considering trees. However, the obvious extensions of popular tree-based methods such as maximum parsimony and maximum likelihood face a serious problem—if we judge (...) networks by fit to data alone, networks that have lateral branches will always fit the data at least as well as any network that restricts itself to vertical branches. This is analogous to the well-studied problem of overfitting data in the curve-fitting problem. Analogous problems often have analogous solutions and we propose to treat network inference as a case of model selection and use the Akaike Information Criterion (AIC). Strictly tree-like networks are more parsimonious than those that postulate lateral as well as vertical branches. This leads to the conclusion that we should not always infer LGT events whenever it would improve our fit-to-data, but should do so only when the improved fit is larger than the penalty for adding extra lateral branches. (shrink)

Dawkins in his The Selfish Gene(1) quite aptly applies the term “selfish” to parasitic repetitive DNA sequences endemic to eukaryotic genomes, especially vertebrates. Doolittle and Sapienza(2) as well as Orgel and Crick(3) enlivened this notion of selfish DNA with the identification of such repetitive sequences as remnants of mobile elements such as transposons. In addition, Orgel and Crick(3) associated parasitic DNA with a potential to outgrow their host genomes by propagating both vertically via conventional genome replication as well as infectiously (...) by horizontal gene transfer (HGT) to other genomes. Still later, Doolittle(4) speculated that unchecked HGT between unrelated genomes so complicates phylogeny that the conventional representation of a tree of life would have to be replaced by a thicket or a web of life.(4) In contrast, considerable data now show that reconstructions based on whole genome sequences are consistent with the conventional “tree of life”.(5–10) Here, we identify natural barriers that protect modern genome populations from the inroads of rampant HGT. BioEssays 27:741–747, 2005. © 2005 Wiley Periodicals, Inc. (shrink)

Nowadays, it is frequently seen that theology education is criticized over secularism or piety concerns. In fact, it has recently been observed that those who have opposed the existence of the theology faculties within the university system for religious reasons have tried to make their voices heard on different platforms, especially on social media. The discussions conducted on different platforms mostly run without a scientific basis. The aim of this study is to determine the views of theology faculty students with (...) regard to the studying on campus and to contribute to the structure of the evaluations on higher religious education-university dilemma on a scientific basis. Metaphor technique was used for data collection. Data were collected in April 2019 using open-ended questions from 228 sophomore, junior, or senior students at Faculty of Theology in Zonguldak Bülent Ecevit University. Content analysis and chi-square technique were used in the data analysis. The research revealed that the majority of students (%73, 2) produced positive metaphors for studying theology on campus. Students mostly explain the positive experience of studying on campus through the possibility of growing up as a well-equipped theologian, recognizing real-life, and representing religion. It was also determined that the students who completed the associate degree and continued theology faculty highlighted the positive aspects of theology education on campus.Summary: While higher education throughout history has been undertaken by madrasas in the East and monastic schools in the West, it has been represented by the modern university in the last two centuries. The madrasas and monastic schools were religious institutions in terms of aims, epistemological and pedagogical understanding, institutional structures, and the lifestyle they produced. The aim of these institutions, which are subordinate to religious authority, was to educate the man on behalf of God while giving this education in accordance with the religion. The university, which replaces madrasas and monastic schools, was not different from the tradition of madrasas and monastic schools when it was first established. The first universities and colleges that were accepted as the ancestors of the well-established universities in the West were schools established for religious purposes. Indeed, many of the western universities established in the past for religious purposes continue their administrative and financial ties with the church. On the other hand, after enlightenment, education has ceased to be a business of religious institutions, and national states have established modern universities to train people suitable for their own needs. The modern university that is positivist and rationalist reveals information to educate people and to perfect society in the name of the state and the economy, not for the God. Research shows that both universities that maintain their ties with the church and state universities participate in the secularization process deeply. Nevertheless, religion continues to exist in different forms at universities, which is much more intense at universities that continue their connection with the church. In addition to the theology and religious studies programs, religion finds a place in the modern university campus through accredited student organizations, campus priests and preachers, social organizations, etc.When Darülfünun (Dār al-Fünūn) the first example of a modern university was established in Turkey in 1900, theology faculty became one of the three faculties. However, whether a modern university is a suitable place for higher religious education has been a controversial issue. In 1915, theology faculty was removed from the university system, then re-established in the university again in 1924, and in 1933, theology education was terminated due to the discussions of modernization. In 1949, the theology faculty was reintroduced at the university; and after 1959, High Islamic Institutes were established under the Ministry of National Education. The inclusion of religious education in the university has been one of the issues that frequently occupy the agenda until 1982, when all higher religious education institutions were included in the university system. In these discussions, the interesting thing is that religious people insist on being included in the university system although various groups oppose in the name of secularism principle. Even more interesting is that there are still demands for higher religious education outside the university, although the number of theology faculties has increased in recent years. In order to make the madrasas to be function as an alternative or complement to theology faculty, they claim that the theology degree completion program or open theology program must be expanded. In fact, it has recently been observed that those who have opposed the existence of the theology faculties within the university system for religious reasons have tried to make their voices heard on different platforms, especially on social media. Those who make such claims, claim that the university is not a suitable place for religious education in terms of epistemology, pedagogy, and social life.This study aims to determine the views of theology faculty students with regarding to the studying on campus and to contribute to the structure of the evaluations on higher religious education-university dilemma on a scientific basis. Within this framework, three basic questions were investigated: (i) Do students highlight positive or negative aspects of theology education on campus? (ii) What kind of experiences are reflected on the positive or negative aspects of theology education on campus from the metaphors? (iii) Is there any difference among the metaphors of the students according to the gender and enrolling types to the faculty (university entrance exam or vertical transfer exam and non-exam enrolling system)? Metaphor technique was used for data collection. Data were collected in April 2019 using open-ended questions from 228 sophomore, junior, or senior students at Faculty of Theology in Zonguldak Bülent Ecevit University. Content analysis and chi-square technique were used in the data analysis.The research revealed that the majority of students (%73, 2) produced positive metaphors for theology education on campus. Students mostly explain the positive experience depending on the possibility of growing up as a well-equipped theologian, experiencing real-life, and representing religion. Among the reasons of the negative metaphor producers, the degenerative effect of the campus environment, the exclusion, and the desire to study in a religious environment come to the fore. It was also determined that the students who completed the associate degree and continued theology faculty highlighted the positive aspects of theology education on campus. Consequently, results show strong student support for theology education at university.In our opinion, it is possible to interpret the recent debates on the inclusion of theology faculties within the university system through the general tendencies of religious people who encounter modernism. In this regard, the results provide important clues. Religious people who encounter modernism generally preferred one of the following three ways: ghetto closure, conflict with the modern, seeking a consensus-based way to continue to touch the life of modern people with the message of religion over time and space. While those who prefer ghettos and conflict reject everything that is modern, those who are accommodating seek ways to keep religion together with modern people and institutions despite some risks. Results show that most of the theology students consider the university as a place that offers opportunities for religious education despite the secular and sometimes challenging environment of the campus. This means that they have a strong self-confidence in the beauty that religion can bring to modern life and modern people. (shrink)

In contrast to vertical gene transfer from parent to offspring, horizontal (or lateral) gene transfer moves genetic information between different species. Bacteria and archaea often adapt through horizontal gene transfer. Recent analyses indicate that eukaryotic genomes, too, have acquired numerous genes via horizontal transfer from prokaryotes and other lineages. Based on this we raise the hypothesis that horizontally acquired genes may have contributed more to adaptive evolution of eukaryotes than previously assumed. Current candidate sets of (...) horizontally acquired eukaryotic genes may just be the tip of an iceberg. We have recently shown that adaptation of the thermoacidophilic red algaGaldieria sulphurariato its hot, acid, toxic‐metal laden, volcanic environment was facilitated by the acquisition of numerous genes from extremophile bacteria and archaea. Other recently published examples of horizontal acquisitions involved in adaptation include ice‐binding proteins in marine algae, enzymes for carotenoid biosynthesis in aphids, and genes involved in fungal metabolism.Editor's suggested further reading in BioEssaysJumping the fine LINE between species: Horizontal transfer of transposable elements in animals catalyses genome evolution Abstract. (shrink)

There has been much discussion about how to obtain legitimacy at macro-level priority setting in health care by use of fair procedures, but how should we consider priority setting by individual clinicians or health workers at the micro-level? Despite the fact that just health care totally hinges upon their decisions, surprisingly little attention seems being paid to the legitimacy of these decisions. This paper addresses the following question: what are the conditions that have to be met in order to ensure (...) that individual claims on health care are well aligned with an overall concept of just health care? Drawing upon a distinction between individual and aggregated needs, I argue that even though we assume the legitimacy of macro-level guidelines, this legitimacy is not directly transferable to decisions at micro-level simply by adherence to the guidelines’ recommendation. Further, I argue that individual claims are subject to the formal principle of equality and the demands of vertical and horizontal equity in a way that gives context- and patient-related equity concerns precedence over equity concerns captured at the macro-level. I conclude that if we aim to achieve just health care, we need to develop a complementary framework for legitimising individual judgment of patients’ claims on health care resources. Moreover, I suggest the basic structure of such a framework. (shrink)

Variation, adaptation, heredity and fitness, constraints and affordances, speciation, and extinction form the building blocks of the (Neo-)Darwinian research program, and several of these have been called “Darwinian principles.” Here, we suggest that caution should be taken in calling these principles Darwinian because of the important role played by reticulate evolutionary mechanisms and processes in also bringing about these phenomena. Reticulate mechanisms and processes include symbiosis, symbiogenesis, lateral gene transfer, infective heredity mediated by genetic and organismal mobility, and hybridization. (...) Because the “Darwinian principles” are brought about by both vertical and reticulate evolutionary mechanisms and processes, they should be understood as foundational for a more pluralistic theory of evolution, one that surpasses the classic scope of the Modern and the Neo-Darwinian Synthesis. Reticulate evolution moreover demonstrates that what conventional (Neo-)Darwinian theories treat as intra-species features of evolution frequently involve reticulate interactions between organisms from very different taxonomic categories. Variation, adaptation, heredity and fitness, constraints and affordances, speciation, and extinction therefore cannot be understood as “traits” or “properties” of genes, organisms, species, or ecosystems because the phenomena are irreducible to specific units and levels of an evolutionary hierarchy. Instead, these general principles of evolution need to be understood as common goods that come about through interactions between different units and levels of evolutionary hierarchies, and they are exherent rather than inherent properties of individuals. (shrink)

Frequent lateral genetic transfer undermines the existence of a unique “tree of life” that relates all organisms. Vertical inheritance is nonetheless of vital interest in the study of microbial evolution, and knowing the “tree of cells” can yield insights into ecological continuity, the rates of change of different cellular characters, and the evolutionary plasticity of genomes. Notwithstanding within-species recombination, the relationships most frequently recovered from genomic data at shallow to moderate taxonomic depths are likely to reflect cellular inheritance. (...) At the same time, it is clear that several types of ‘average signals’ from whole genomes can be highly misleading, and the existence of a central tendency must not be taken as prima facie evidence of vertical descent. Phylogenetic networks offer an attractive solution, since they can be formulated in ways that mitigate the misleading aspects of hybrid evolutionary signals in genomes. But the connections in a network typically show genetic relatedness without distinguishing between vertical and lateral inheritance of genetic material. The solution may lie in a compromise between strict tree-thinking and network paradigms: build a phylogenetic network, but identify the set of connections in the network that are potentially due to vertical descent. Even if a single tree cannot be unambiguously identified, choosing a subnetwork of putative vertical connections can still lead to drastic reductions in the set of candidate vertical hypotheses. (shrink)

Holobionts, consisting of a host and diverse microbial symbionts, function as distinct biological entities anatomically, metabolically, immunologically, and developmentally. Symbionts can be transmitted from parent to offspring by a variety of vertical and horizontal methods. Holobionts can be considered levels of selection in evolution because they are well-defined interactors, replicators/reproducers, and manifestors of adaptation. An initial mathematical model is presented to help understand how holobionts evolve. The model offered combines the processes of horizontal symbiont transfer, within-host symbiont proliferation, (...) vertical symbiont transmission, and holobiont selection. The model offers equations for the population dynamics and evolution of holobionts whose hologenomes differ in gene copy number, not in allelic or loci identity. The model may readily be extended to include variation among holobionts in the gene identities of both symbionts and host. (shrink)

Robustness is a fundamental property of biological systems, observed ubiquitously across species and at different levels of organization from gene regulation to ecosystem. The theory of biological robustness argues that robustness fosters evolv-ability and that together they entail various tradeoffs as well as characteristic architectures and mechanisms. We argue that classes of biological systems have evolved to enhance their robustness by extending their system boundary through a series of symbioses with foreign biological entities . A series of major biological innovations (...) has been achieved by events consistent with this framework: horizontal gene transfer, serial endosymbiosis, oocytes-mediated vertical infection, and host-symbiont mutualism for bacterial flora. Self-extending symbiosis contributes to robustness because symbiotic foreign biological entities can enhance the adaptative capacity of the system against environmental perturbations as well as contribute novel functions. In addition, evolutionary history indicates that the degree of symbiosis achieved has substantially changed from tight integration into the genome to loose integration as bacterial flora . The most dramatic example can be seen in the symbiosis of host immune system and bacterial flora in which substantial function of host defense depends on the proper maintenance of bacterial flora and its adaptive capability. Biological systems following this type of evolutionary path might have attained high levels of functionality, robustness, and evolvability. Thus, robustness, evolution, and self-extending symbiosis may form essential system principles for biology. (shrink)

In this paper we examine the theoretical foundations underlying the testing of quantum electrodynamics. We show that for the photon propagator (together with the contiguous vertices) it is not necessary to introduce ad hoc modifications in sufficiently accurate scattering experiments. Energy, momentum transfer, and accuracy determine the tested length in a model-independent way. The situation is quite different with the electron propagator. If gauge invariance is taken for granted, the electron propagator cannot be tested with processes where diagrams with (...) open electron lines are important in the lowest order of perturbation theory. These processes can only give limits for anomalous moment and multiphoton parts of the vertices. On the other hand, processes with closed electron loops (vacuum polarization), such as photon-photon and Delbrück scattering, as well as photon splitting or corresponding low-energy, high-precision experiments can give limits also for the electron propagator. But in these cases only less accurate limits can be obtained, which depend on the modification model. Hence testing of the electron propagator, i.e., roughly speaking, the Dirac equation, is much more difficult than testing of the photon propagator, i.e, Maxwell's equations. (shrink)

This article is about a period of technology transfer – the late 1910s and 1920s – when wartime aerial reconnaissance techniques and operations were being adapted to a range of civilian uses, including urban planning, land use analysis, traffic control, tax equalization, and even archaeology. At the center of the discussion is the ‘photomosaic’: a patchwork of overlapping aerial photographs that have been rectified and fit together so as to form a continuous survey of a territory. Initially developed during (...) the First World War to provide coverage of fronts, photomosaic mapping was widely practiced and celebrated during the postwar years as an aid to urban development. The article traces both the refinements in photomosaic technology after the Armistice and the rhetorical means by which the form’s avant-garde wartime reputation was domesticated into an ‘applied realism’ that often effaced its site-specific perspective, its elaborately rectified optics, and the oppositionality of both its military and civilian uses. The article has a broader theoretical aim as well. Classic statements of both structuralist and post-structuralist spatial theory (Barthes and de Certeau are the primary examples here) have produced an ossified geometry wherein the vertical is the axis of paradigm, top-down strategy, and manipulative distance and the horizontal the axis of syntagm, grassroots tactics, and resistant proximities and differences. In its close study of the technology and rhetoric surrounding interwar photogrammetry, the article provides an example of how one might reverse the long-standing misrecognition of high-altitude optics as effacing time, difference, and materiality – and what it might mean to view such optics as, instead, a resource in turning from abstract toward differential conceptions of both aerial photography and our theoretical habits. This turn I call ‘applied modernism’, a term that accesses both the wartime photomosaic’s affiliation with avant-garde painting and its insistence that portraits of the total are always projections from partial, specific vantages. (shrink)

This paper investigates the complexity hypothesis in microbial evolutionary genetics from a philosophical vantage. This hypothesis, in its current version, states that genes with high connectivity are likely to be resistant to being horizontally transferred. We defend four claims. There is an important distinction between two different ways in which a gene family can persist: vertically and horizontally. There is a trade-off between these two modes of persistence, such that a gene better at achieving one will be worse at achieving (...) the other. At least some genes are likely to experience selection favoring increased transferability. One consequence of this can be encapsulated as the “simplicity hypothesis”: horizontally persisting genes will experience selection favoring reduced connectivity. In order to make sense of the simplicity hypothesis, we need to consider evolutionary populations that transcend species boundaries. Vertical and horizontal persistence are therefore not two competing ways of succeeding at the same game, but involve playing two different games altogether. The complexity hypothesis can be understood in terms of two related notions: entrenchment and Cuvierian functionalism. This framing reveals previously unrecognized and philosophically interesting connections between reasoning about deep conservation and horizontal transfer. (shrink)

Māturīdism is an Ottoman identity and this identity was not limited, as is commonly believed, to the last period of the Empire. It maintained its formal existence throughout the Ottoman history. Nevertheless, the context in which the Māturīdism was located or with which it was associated changed in the course of time. In the early period when the eclectic way of thinking was dominant, Māturīdism as a creed was apparent mainly in the jurists whose ascetic identity was prominent and partly (...) in the mystical currents that were essentially continuations of Yasawiyya. At this point, the Bukhara-centered Ḥanafī legal literature played a distinctive role. At the time of Meḥmed II and in the following period during which the philosophical kalām dominated the scene, the Māturīdism was relatively passive and was in search of a position against the Ash‘arism. The new Rāzian paradigm of thought that began to be felt strongly in the Ottoman lands with Meḥmed II as an attempt of integration into the global circulation of knowledge prevented to a certain extent the visibility of Māturīdism. However, even in this period, Māturīdism was remarkably reflected in the muqaddimāt-i arba‘a literature which was directly sponsored by Meḥmed II. The tradition of philosophical kalām in the Ottoman scholarship, just when it was about to yield significant results, was interrupted due to the struggle against the Ṣafawids. Transformation of this political tension, at the same time, into a fight against Shiism also brought about a constriction in the religious thought of the Ottomans. Shiism and its all other variants were bitterly attacked under the main heading of Rāfiḍa. Unfortunately such a refutational approach proved a boomerang and returned in time striking the Ottoman Ṣūfīs who stood near the line of the Ardabil Shrine before its Shiitization. Ḥanafī fatwā literature was used extensively in the refutation texts against Ṣafawids. This brought to the fore at first the Ḥanafite and then the Māturīdite identity. This paper attempts to analyze this changing emphasis on Māturīdism in the Ottoman period and the political and intellectual factors that supported and nourished it. -/- SUMMARY It can be argued that the debates around Ash‘arism and Māturīdism in the Ottoman period and the resulting meant more than attempts of the members of the two sides to understand each other and that Māturīdism, particularly from the 16th century onwards, was gradually brought fore as the identity of Ottomans. In fact, this identity was not limited, as is commonly believed, to the last period of the Empire; it maintained, in form, its existence throughout the Ottoman history. Nevertheless, the context in which the Māturīdism was located or with which it was associated changed in the course of time. In the early period when the eclectic way of thinking was dominant, Māturīdism as a creed was apparent mainly in the jurists whose ascetic identity was prominent and partly in the mystical currents that were essentially continuations of Yasawiyya. At this point, the Bukhara-centered Ḥanafī legal literature played a distinctive role. At the time of Meḥmed II and in the following period during which the philosophical kalām dominated the scene, the Māturīdism was relatively passive and was in search of a position against the Ash‘arism. In this period, Ottoman scholars still embraced the Māturīdī-Ḥanafī line in their theological views. Ḫiḍir Beg’s al-Qaṣīda al-Nūniyya, and al-Khayālī’s commentary upon it, and the commentary written by Aḥmad b. Oġuz Dānishmand al-Aḳshahrī on al-I‘timād of Abū al-Barakāt al-Nasafī were the most noticeable Māturīdite texts from that time. Besides, al-Khayālī’s supercommentary (ḥāshiya) upon the commentary of al-Taftāzānī written on al-‘Aqā’id of Najm al-Dīn ‘Umar al-Nasafī was also of central importance. However, the new Rāzian paradigm of thought that began to be felt strongly in the Ottoman lands with Meḥmed II as an attempt of integration into the global circulation of knowledge prevented to a certain extent the visibility of Māturīdism. But, this should not be taken to mean that Māturīdism lost its ground of existence. That the Ash‘arite works produced in this new paradigm were transferred to and fully integrated in the madrasa curriculum was not because they were Ash‘arite texts but because they were the most original and highest achievements of the philosophical theology. These texts that aimed at combining all fields of knowledge on a single platform, despite the Ash‘arism they included, constituted the peak of the Islamic thought of the time. In the preference of these texts, the fact that the Māturīdī tradition generally stood, in course of time, distant to the philosophy and chose to continue the kalām in the classical line also played a role. Māturīdī theologians Muḥammad b. Ashraf al-Samarqandī, partly, but Ṣadr al-Sharī‘a al-Maḥbūbī, to a greater extent, were notable exceptions to this general Māturīdī tendency. These figures were theologically Māturīdite, but their framework of producing discourse was the combination of philosophy and kalām as with their Ash‘arī counterparts. Therefore, Ṣadr al-Sharī‘a’s criticism of Fakhr al-Dīn al-Rāzī, and through him, of against the Ash‘arism in the context of muqaddimāt arba‘a was wholeheartedly supported by the Ottoman ulama. Even it was Meḥmed II who sponsored the debates regarding muqaddimāt arba‘a. The works written by such scholars as Muṣliḥ al-Dīn al-Kastallī, al-Ṣamṣūnī, ‘Alā’ al-Dīn al-‘Arabī, Mollā ‘Arab al-Anṭākī, Khaṭībzāde, Sa‘dī Chalabī during his and his son Bāyazid II’s reigns were the supercommentaries written upon the related chapter of al-Talwīḥ, al-Taftāzānī’s commentary on Ṣadr al-Sharī‘a’s al-Tawḍīḥ where the former responded to the criticism of the latter from an Ash‘arī point of view. The Ottoman ulama, in their workswere forced to choose between the two scholars and they mostly supported Ṣadr al-Sharī‘a and Māturīdism. The tradition of philosophical kalām in the Ottoman scholarship, just when it was about to yield significant results, was interrupted due to the struggle against the Ṣafawids. Transformation of this political tension, at the same time, into a fight against Shiism also brought about a constriction in the religious thought of the Ottomans. The reflex of of identifying oneself through ‘the other’ made, to a certain extent, the theological and philosophical debates regarding faith meaningless, and gradually gave the Ottoman Sunnism a doctrinal and political tone. In such a context, the Ottomans’ paradigm of producing thought in line with the philosophical kalām began to lose its function, and, the focus of scholarhsip shifted; Shiism with its all variants were began to be bitterly attacked under the main heading of Rāfiḍa. When the refutation texts composed from the reign of Bāyazid II onward to criticize the Ṣafawids are chronologically analyzed, it is seen that the contents of the texts evolved from criticism of Rāfiḍa to criticism of Sūfism. Ḥanafī fatwā literature was used extensively in these refutations. So the fatwās issued against Rāfiḍa and Ṣūfīs in malāmatī line in earlier centuries in different contexts for different reasons were employed to criticize the new opponents. This caused two important results: First, such an approach proved a boomerang and returned in time striking the Ottoman Ṣūfīs who stood near the line of the Ardabil Shrine before its Shiitization. Ḫalwatīs, Bayrāmīs, Gulshanīs, Baktāshīs and Mawlawīs were the sufi groups influenced by this situation in varying degrees. Second, Sunnism was exposed to the narrowization and centered around the fiqh, particularly Ḥanafī fiqh, in the context of Ḳāḍīzādelīs who were the main adversaries of above mentioned groups. The culture of catechism (‘ilm-i ḥāl) that came to the fore through the efforts of Ḳāḍīzādelīs was a crystallization and was mainly fuelled from this tension. Such a crystallization led the Ṣūfīs, the opponents of Ḳāḍīzādelīs, to a higher level of discourse deemphasizing the Ḥanafī aspect: They underscored the discourse of Ahl al-Sunna and four madhhabs, and mostly turned towards the Shāfiʿī and Ash‘arī traditions to look for support fortheir views. This process during which the emphasis of sharī‘a and tradition began to come to the fore once again paved the way for the zuhd and fiqh-centered religious thought that was maintained from the time of the Seljukids in Anatolia and was influential until Meḥmed II’ reign. Therefore in the Ottomans, particularly starting with the reign of Suleymān I, an intensive emphasis on Abū Ḥanīfa was witnessed. Abū Ḥanīfa was at the very center of the debates revolving around zuhd and fiqh which came about in the same period and in which the sharī‘a sensitivity was a determining factor. Al-Māturīdī, whose name was overshadowed for a long time by the name of Abū Ḥanīfa, but who became prominent in the tradition with Abū al-Mu‘īn al-Nasafī, had to transfer his gains for a period of time to Abū Ḥanīfa. Emphasis on Abū Ḥanīfa looks like a rope that when pulled, all the tradition comes with it. When the topics began to be discussed in a manner that would also include the theological context, the contribution of the works ascribed to Abū Ḥanīfa, namely al-Fiqh al-Akbar, al-Waṣiyya and al-‘Ālim wa al-Muta‘allim to the discussions would be limited. For this reason, the need to refer to al-Māturīdī or to the theological formation bearing his name was inevitable. So, the literature on the points of disagreements between the Ash‘arism and the Māturīdism developed both vertically and horizontally in the 18th century and, corollary to that, the debates of free will as a corolloary to that, once again brought Māturīdism to the fore. (shrink)

A possible atomic mechanism underlying the Re- and Ru-induced strengthening effects on the n - n ' interface in Ni-based single-crystal superalloys has been investigated using the DMol3 molecular orbital package based on density functional theory. The calculation of bonding properties has been performed on a cluster designed to model Re and Ru strengthening effects within the interface. The stronger Re--Ni bonds are formed mainly as a result of d- hybridization, while the Ni--Ni bonding become weaker accompanying the Re substitution. (...) The vertical and horizontal bond orders for a local environmental cluster are proposed and developed for the description of the strengthening effect on the n - n ' interface, with larger bond order values achieving better effect. Results show that both Re and Ru significantly strengthen the interface. It is also shown that the strengthening effect of Re is better than that of Ru, and this is explained in terms of the charge transfer of electrons between orbitals of Ru atom according to Mulliken population analysis. The calculation results provide a basis for understanding the atomic mechanism of Re- and Ru-induced n - n ' interfacial strengthening. (shrink)

Integrative mobile genetic elements (MGEs), such as transposons and insertion sequences, propagate within bacterial genomes, but persistence times in individual lineages are short. For long‐term survival, MGEs must continuously invade new hosts by horizontal transfer. Theoretically, MGEs that persist for millions of years in single lineages, and are thus subject to vertical inheritance, should not exist. Here we draw attention to an exception – a class of MGE termed REPIN. REPINs are non‐autonomous MGEs whose duplication depends on non‐jumping (...) RAYT transposases. Comparisons of REPINs and typical MGEs show that replication rates of REPINs are orders of magnitude lower, REPIN population size fluctuations correlate with changes in available genome space, REPIN conservation depends on RAYT function, and REPIN diversity accumulates within host lineages. These data lead to the hypothesis that REPINs form enduring, beneficial associations with eubacterial chromosomes. Given replicative nesting, our hypothesis predicts conflicts arising from the diverging effects of selection acting simultaneously on REPINs and host genomes. Evidence in support comes from patterns of REPIN abundance and diversity in two distantly related bacterial species. Together this bolsters the conclusion that REPINs are the genetic counterpart of mutualistic endosymbiotic bacteria. (shrink)

The article proposes to further develop the ideas of the Extended Evolutionary Synthesis by including into evolutionary research an analysis of phenomena that occur above the organismal level. We demonstrate that the current Extended Synthesis is focused more on individual traits (genetically or non-genetically inherited) and less on community system traits (synergetic/organizational traits) that characterize transgenerational biological, ecological, social, and cultural systems. In this regard, we will consider various communities that are made up of interacting populations, and for which the (...) individual members can belong to the same or to different species. Examples of communities include biofilms, ant colonies, symbiotic associations resulting in holobiont formation, and human societies. The proposed model of evolution at the level of communities revises classic theorizing on the major transitions in evolution by analyzing the interplay between community/social traits and individual traits, and how this brings forth ideas of top-down regulations of bottom-up evolutionary processes (collaboration of downward and upward causation). The work demonstrates that such interplay also includes reticulate interactions and reticulate causation. In this regard, we exemplify how community systems provide various non-genetic ‘scaffoldings’, ‘constraints’, and ‘affordances’ for individual and sociocultural evolutionary development. Such research complements prevailing models that focus on the vertical transmission of heritable information, from parent to offspring, with research that instead focusses on horizontal, oblique and even reverse information transmission, going from offspring to parent. We call this reversed information transfer the ‘offspring effect’ to contrast it from the ‘parental effect’. We argue that the proposed approach to inheritance is effective for modelling cumulative and distributed developmental process and for explaining the biological origins and evolution of language. (shrink)

We consider application of the structural approximation method to research information flow in social networks. The notations of potential, interparticle flux and energy are considered in terms of social networks. The basic notations of society functioning related to the communication and information transfer processes are modeled by means of multidimensional potentials and the corresponding interactions arisen in networks. A graph associated to the network is considered in the high dimensional space R^d when d is comparable with the number of (...) vertices in graphs. (shrink)

Contemporary medical education must train skilled and compassionate health care professionals who are rigorous in their approach to patient care and their pursuit of knowledge and solutions. Problem-based learning has been widely introduced, but there is no evidence that it leads to better outcomes than more traditional programs, and fundamental gaps in conceptual knowledge may result. Recently, emphasis has been placed on a solid grounding in underlying concepts combined with a systems-based approach, and ability to transfer information and solve (...) problems. Integrating traditional scientific and clinical disciplines with progressive and continuous assessment, may be a better means of achieving the combined aims of clinically relevant curriculum design, vertical integration of medical knowledge, and facilitation of the continuum of training. Being adaptable and flexible, cognisant of costs, and driven by evidence are key features of delivering medical education and contemporary medical practice. Educational research should lead to continuous improvement, but innovation without evaluation and attention to costs may create as many, or more, problems as are solved. (shrink)

The present study of the philosophical orientation within the poetics of Rilke and Stevens aims to show that in the context of modern poetry, transcendence, or “crossing beyond,” must be understood in two distinct senses, as vertical and horizontal projections. The usurpation of one by the other or the transfer between them distinguishes the poetry of Rilke and Stevens and makes a comparative reading particularly illuminating. The fact that Rilke and Stevens are two of the most widely invoked (...) poets in the phenomenological tradition will help to establish a modern sense of transcendence distinct from a traditional or Romantic longing for a realm above and beyond earthly existence. This would be an “immanent” transcendence, a crossing of horizons between perception and imagination or imagination and reality, by the disclosures and inventions of which, it is argued here, the more traditional notion of transcendence is usurped in distinct ways. (shrink)

Objectivity and value freedom have often been conflated in the philosophical and sociological literature. While value freedom construed as an absence of social and moral values in scientific work has been discredited, defenders of value freedom bracket off methodological values or practices from social and moral ones. In this paper I will first show how values exist along a continuum and argue that science is and should be value based. One of these values is necessarily objectivity for science to be (...) possible. However the version of objectivity I will describe is socially situated in methodological practice, but also crucially in the particular purpose of a given science. Objectivity (or its absence) may be transferred vertically from practices, goals, or discourses outside science through several levels to that of the day-to-day activities of the scientist. It is also possible for this transfer to occur in the other direction and indeed objectivity can be situated in extra-scientific practices and discourses. Objectivity (or its absence) may also be transferred horizontally within particular methodological practice to other disciplines or parts of a discipline. Ultimately a socially situated objectivity is an achievement of the community of science. I will use some brief contemporary and historical illustrations from science and the intersection of science and public policy to show how objectivity has been achieved or failed. (shrink)

Guess the defined words and write them below, one letter per numbered blank. Transfer each letter of these words to the appropriate numbered square in the diagram. The filled-in diagram should contain a quotation reading from left to right. Only black squares, not ends of lines, indicate word endings, The first letters of the guessed words should give, reading vertically, the author of the quotation and the title of the work from which it was taken. Veteran readers of the (...) Saturday Review and the Sunday New York Times should already be familiar with such double-crostic puzzles, which were originally developed by Elizabeth S. Kingsley, Doris Nash Wortman, and Thomas H. Middleton. (shrink)

Thomas Kuhn had little to say about scientific change in biological science, and biologists are ambivalent about how applicable his framework is for their disciplines. We apply Kuhn’s account of paradigm change to evolutionary microbiology, where key Darwinian tenets are being challenged by two decades of findings from molecular phylogenetics. The chief culprit is lateral gene transfer, which undermines the role of vertical descent and the representation of evolutionary history as a tree of life. To assess Kuhn’s relevance (...) to this controversy, we add a social analysis of the scientists involved to the historical and philosophical debates. We conclude that while Kuhn’s account may capture aspects of the pattern of an episode of scientific change, he has little to say about how the process of generating new understandings is occurring in evolutionary microbiology. Once Kuhn’s application is limited to that of an initial investigative probe into how scientific problem-solving occurs, his disciplinary scope becomes broader. (shrink)

Wang Yangming’s discussions concerning evil mainly appear in two sets of texts, i.e., Chuanxilu 传习录 (Instructions for Practical Living) and gongyi 公移 (documents transferred to vertically unrelated departments). The former addresses evil in metaphysical terms, and the latter in social terms. These subtly different approaches show the nuance between self-cultivation and governance of others.

We present an annotated bibliography of peer reviewed scientific research highlighting the human health, animal welfare, and environmental risks associated with genetic modification. Risks associated with the expression of the transgenic material include concerns over resistance and non-target effects of crops expressing Bt toxins, consequences of herbicide use associated with genetically modified herbicide-tolerant plants, and transfer of gene expression from genetically modified crops through vertical and horizontal gene transfer. These risks are not connected to the technique of (...) genetic modification as such, but would be present for any conventionally produced crops with the same heritable traits. In contrast, other risks are a direct consequence of the method used in gene manipulation. These come about because of the unstable nature of the transgene and vectors used to insert it, and because of unpredictable interactions between the transgene and the host genome. The debate over the release of genetically modified organisms is not merely a scientific one; it encompasses economics, law, ethics, and policy. Any discussion on these levels does, however, need to be informed by sound science. We hope that the scientific references provided here will provide a useful starting point for further debate. (shrink)

The dominant position of e-commerce is especially being articulated in the retailing industry once again due to several constraints that the world faces in the COVID-19 pandemic era. In this regard, this study explores the significant role of trust transfer and the moderating effect of consumers’ neurotic traits in the framework of trust-satisfaction-repurchase intention in the e-commerce context based on a survey with 406 Korean e-commerce consumers. Moreover, a prediction-oriented segmentation technique combined with structural equation models was utilized to (...) reveal consumers’ probable hidden heterogeneous characteristics. The outcomes of the global model SEM analysis indicate that offline-online trust transference occurs in e-commerce, and the conveyed trust significantly influences satisfaction and consumers’ repeat purchase intention through satisfaction. Neuroticism also has significant positive effects on trust transfer in the global model. However, results in three subgroups generated by POS show heterogeneous characteristics that considerably differed from the global model test results. The implications from this study will be beneficial to field practitioners in the e-commerce industry in addressing the importance of trust transfer, negative neurotic traits as well as heterogeneous aspects of consumers. (shrink)

Internet technology has given birth to continuous changes in business model and format innovation. With increasingly critical consumers, blowout development model and format innovation, enterprises are increasingly aware of the importance of customer participation in service innovation. At the same time, the development of information technology provides convenient conditions for communication between enterprises and customers, and online virtual community also provides a platform for customers to participate in the process of enterprise service innovation in an instant. Based on the theory (...) of customer participation, knowledge transfer and service innovation performance, this paper explores the influence mechanism of customer participation in virtual community on service innovation performance, and analyzes the mediating role of knowledge transfer. Through the analysis of the results of the questionnaire, the relevant hypotheses are verified. The results show that customer participation in virtual community has a positive impact on service innovation performance. Customer participation helps enterprises obtain relevant knowledge such as customer needs and reduce barriers to knowledge sharing. In addition, enterprises will acquire customer knowledge about new products, which provides the possibility for the development of new products and services, thereby enhancing the enterprises’ service innovation performance. Knowledge transfer plays a part of mediating role between customer participation and service innovation performance. In the process of enterprises’ service innovation, customers mainly participate in the enterprise by means of knowledge transfer and help the enterprise improve service innovation performance. (shrink)

This paper proposes a methodology to investigate how the conceptual structure of a model may have borrowed from an already existing model in a different field. From a reverse perspective, it amounts to hypothesizing that an already existing model was somehow transferred to a new field and incorporated into a newly constructed model with the purpose of explaining some additional phenomena. We use two well-known theoretic models, Robert Malthus’ model of human population and Darwin’s model of organism population included in (...) the theory of evolution by natural selection, to exemplify this “incorporation of a conceptual structure” methodology. By highlighting how the conceptual structure of Malthus’ model actually sits within that of Darwin’s model, we show how Darwin’s model may have been constructed, on the one hand, and how Malthus’ model may have been transferred, on the other hand. In order to show how the construction and transfer occur, we outline five epistemic strategies that could be underlying incorporation. Overall, this methodology can be viewed as a diadic and bijective perspective on models that can be applied to other similar cases, using “construction” and “transfer” as complementary handles to probe the available conceptual, structural, and historiographical material. (shrink)

Capacities for abstract thinking and problem‐solving are central to human cognition. Processes of abstraction allow the transfer of experiences and knowledge between contexts helping us make informed decisions in new or changing contexts. While we are often inclined to relate such reasoning capacities to individual minds and brains, they may in fact be contingent on human‐specific modes of collaboration, dialogue, and shared attention. In an experimental study, we test the hypothesis that social interaction enhances cognitive processes of rule‐induction, which (...) in turn improves problem‐solving performance. Through three sessions of increasing complexity, individuals and groups were presented with a problem‐solving task requiring them to categorize a set of visual stimuli. To assess the character of participants’ problem representations, after each training session, they were presented with a transfer task involving stimuli that differed in appearance, but shared relations among features with the training set. Besides, we compared participants’ categorization behaviors to simulated agents relying on exemplar learning. We found that groups performed superior to individuals and agents in the training sessions and were more likely to correctly generalize their observations in the transfer phase, especially in the high complexity session, suggesting that groups more effectively induced underlying categorization rules from the stimuli than individuals and agents. Crucially, variation in performance among groups was predicted by semantic diversity in members’ dialogical contributions, suggesting a link between social interaction, cognitive diversity, and abstraction. (shrink)

Giulia Cavaliere and César Palacios-González argue that lesbian couples should have access to human nuclear genome transfer so that both members of the couple can have a genetic link to the child they intend to parent. Their argument is grounded in an appeal to reproductive freedom. In this Response, I address a number of concerns with their argument. These concerns relate to nomenclature, treating like cases alike, genetic-relatedness and the limits of reproductive rights. On this last point, I insist (...) that we should not mistake ‘wants’ for ‘needs’ or ‘rights’. I maintain that there is no right to biological parenthood, there is no compelling need for human nuclear genome transfer to satisfy a so-called need for genetically-related children, and we ought not to pander to an acquired desire for genetic filiation. (shrink)

This paper argues that a successful philosophical analysis of models and simulations must accommodate an account of mathematically rigorous results. Such rigorous results may be thought of as genuinely model-specific contributions, which can neither be deduced from fundamental theory nor inferred from empirical data. Rigorous results provide new indirect ways of assessing the success of models and simulations and are crucial to understanding the connections between different models. This is most obvious in cases where rigorous results map different models on (...) to one another. Not only does this put constraints on the extent to which performance in specific empirical contexts may be regarded as the main touchstone of success in scientific modelling, it also allows for the transfer of warrant across different models. Mathematically rigorous results can thus come to be seen as not only strengthening the cohesion between scientific strategies of modelling and simulation, but also as offering new ways of indirect confirmation. (shrink)

Like biological species, languages change over time. As noted by Darwin, there are many parallels between language evolution and biological evolution. Insights into these parallels have also undergone change in the past 150 years. Just like genes, words change over time, and language evolution can be likened to genome evolution accordingly, but what kind of evolution? There are fundamental differences between eukaryotic and prokaryotic evolution. In the former, natural variation entails the gradual accumulation of minor mutations in alleles. In the (...) latter, lateral gene transfer is an integral mechanism of natural variation. The study of language evolution using biological methods has attracted much interest of late, most approaches focusing on language tree construction. These approaches may underestimate the important role that borrowing plays in language evolution. Network approaches that were originally designed to study lateral gene transfer may provide more realistic insights into the complexities of language evolution.Editor's suggested further reading in BioEssaysLinguistic evidence supports date for Homeric epics Abstract. (shrink)

I propose an approach that expands philosophical views of scientific change, on the basis of an analysis of contemporary biomedical research and recent developments in the philosophy of scientific change. Focusing on the establishment of the exposome in epidemiology as a case study and the role of data as a context for contrasting views on change, I discuss change at conceptual, methodological, material, and social levels of biomedical epistemology. Available models of change provide key resources to discuss this type of (...) change, but I present the need for an approach that models transfer, alignment, and influence as key processes of change. I develop this as a pragmatic approach to scientific change, where processes might change substantially depending on specific circumstances, thus contributing to and complementing the debate on a crucial epistemological issue. (shrink)

Building computational models of engineered exemplars, or prototypes, is a common practice in the bioengineering sciences. Computational models in this domain are often built in a patchwork fashion, drawing on data and bits of theory from many different domains, and in tandem with actual physical models, as the key objective is to engineer these prototypes of natural phenomena. Interestingly, such patchy model building, often combined with visualizations, whose format is open to a wide range of choice, leads to the discovery (...) of new concepts and control structures. Two key questions are raised by this practice: how could discoveries arise from building external representations for which there is wide latitude in choice of the components from which they are built, and thus can be considered significantly arbitrary, and how could such discoveries allow engineering a real-world prototype system. To examine these questions, we present two case studies of discoveries that emerged from the building of such computational models in the bioengineering sciences. We then develop a process model that accounts for the discovery and transfer problems raised by both these cases, focusing on the process of building the model. Specifically, to account for the discovery problem, we propose that the process of building such models gradually leads to a close coupling between the modeler’s internal processes and the external dynamic model. To account for the transfer problem, we propose that the process of building the model leads to the creation of an enactive model that is generic, which closely enacts, and thus reveals, the way the system-level behavior of the engineered prototype emerges in time through the interaction of its parts. This enactive replication process leads to the model and the prototype forming a new class, which allows concepts and control structures developed for the computational model to be transfered to the real-world prototype. We argue that this account requires rethinking correspondence in engineering sciences as a plastic and enactive relation. A closer focus on the process of building models is required to develop a general account of this emerging approach to discovery. (shrink)

Alternative Learning System (ALS) has been adopted in Philippine basic education, yet there is no academic institution in the region prepares ALS teachers in teaching life skills. ALS teachers graduated from different programs of teacher education for formal education. In response, an extension project was conceptualized and implemented to enhance the teaching capacity and effectiveness of ALS teachers. Case study was conducted to evaluate the effectiveness of the project. It explored the transfer of life skills among ALS teachers. Data (...) were collected from multiple sources. Interview and written responses, and feedbacks were analyzed using thematic narrative analysis. Other data were analyzed using document and descriptive analyses. The project had achieved its objectives and rated best by participants. These indicate that the project was implemented effectively and successfully. ALS teachers have acquired life skills and transferred them to others. Thus, the project has made a difference in the lives of these teachers. (shrink)

This paper uses autocatalytic networks to model discontinuous cultural transitions involving cross-domain transfer, using as an illustrative example, artworks inspired by the oldest-known uncontested example of figurative art: the carving of the Hohlenstein-Stadel Löwenmensch, or lion-human. Autocatalytic networks provide a general modeling setting in which nodes are not just passive transmitters of activation; they actively galvanize, or “catalyze” the synthesis of novel nodes from existing ones This makes them uniquely suited to model how new structure grows out of earlier (...) structure, i.e., cumulative, generative network growth. They have been used to model the origin and early evolution of biological life, and the emergence of cognitive structures capable of undergoing cultural evolution. We conducted a study in which six individual creators and one group generated music, prose, poetry, and visual art inspired by the Hohlenstein-Stadel Löwenmensch, and answered questions about the process. The data revealed four through-lines by which they expressed the Löwenmensch in an alternative art form: lion-human hybrid, subtracting from the whole to reveal the form within, deterioration, and waiting to be found with a story to tell. Autocatalytic networks were used to model how these four spontaneously derived through-lines form a cultural lineage from Löwenmensch to artist to audience. We used the resulting data from three creators to model the cross-domain transfer from inspirational source to creative product. These four spontaneously-generated threads of cultural continuity formed the backbone of this Löwenmensch-inspired cultural lineage, enabling culture to evolve even in the face of discontinuity at the level conventional categories or domains. We know of no other theory of cultural evolution that accommodates cross-domain transfer or other forms of discontinuity. The approach paves the way for a broad scientific framework for the origins of evolutionary processes. (shrink)

We study a low-rationality learning dynamics called probe and adjust. Our emphasis is on its properties in games of information transfer such as the Lewis signaling game or the Bala-Goyal network game. These games fall into the class of weakly better reply games, in which, starting from any action profile, there is a weakly better reply path to a strict Nash equilibrium. We prove that probe and adjust will be close to strict Nash equilibria in this class of games (...) with arbitrarily high probability. In addition, we compare these asymptotic properties to short-run behavior. (shrink)

Rising worldwide scrutiny of the PhD has focused on issues such as return on investment and career outcomes. This article investigates PhD graduate careers and knowledge transfer looking at the Hum...